How to Fix a Crack or Scratch in a Hot Tub Yourself
Don't ignore a hot tub crack, or it will become a much bigger problem
In a perfect world, your hot tub would always be at the right temperature and never have any cracks or scratches. But real life happens, and sometimes hot tubs crack. If so, it is important to find the crack and repair it quickly, before it gets larger and causes damage to the hot tub's internal parts.
Why Is My Hot Tub Cracked?
When a hot tub is properly installed and you practice good hot tub maintenance, the risk of cracking is minimal. There are some factors, however, that go beyond installation or maintenance and may cause a hot tub to crack.
1. Not Draining the Tub Often Enough
Hot tub manufacturers state how long water can remain in the hot tub before you must drain and clean it. If you do not follow those rules, the old water can cause the tub’s acrylic interior to deteriorate and eventually crack.
2. Using Improper Components
Only add components that the hot tub manufacturer approves of to prevent unnecessary pressure or hot tub problems. Anything not meant for the hot tub, including electrical, mechanical, or plumbing components, can weaken the surface, making it more prone to scratches or dents.
3. Excessive Sunlight
Keeping a hot tub properly covered is essential. Excessive sun exposure can cause the surface to expand and contract. This will weaken it and increase the risk of cracking.
4. Inadequate Materials
No manufacturer is perfect; sometimes you may receive defective materials that cause a hot tub to crack. These issues may be covered under the warranty, but you must properly document the issues according to the manufacturer's instructions.
5. Items That Do Not Belong Inside a Hot Tub
Hot tubs are meant for people, not things. Keeping yours covered can prevent fallen tree limbs and other debris from scratching or damaging the hot tub. It is also best to keep shoes, toys, and other foreign objects away from the hot tub to prevent unnecessary damage.
How Much Does It Cost to Repair a Cracked Hot Tub?
A small crack or scratch in your hot tub is usually a quick DIY repair that costs around $25 for the sealant. Larger cracks that cause a leak and require professional hot tub repair cost anywhere from $200 to $1,500.
How to Diagnose a Hot Tub Crack
Before you begin hot tub crack repair, it is important to determine if it is a scratch or a crack. A scratch is simply a cosmetic issue that does not affect the hot tub's integrity despite causing the tub to lose aesthetic appeal. A crack, on the other hand, can damage the underlying material.
If your hot tub has a crack, it could leak water; this can cause serious issues, since water and electricity do not mix, not to mention the amount of water you will lose, making it challenging to use the hot tub.
Is There a Warranty?
Before attempting to fix a crack, read the manufacturer's warranty. If the crack falls under the warranty, any DIY repairs you try may void the warranty. Instead, contact the manufacturer to determine the next steps, which usually involve calling a hot tub repair company near you to fix the issue.
Preparing to Fix a Cracked Hot Tub
You will need a clean, distraction-free area to work when fixing a crack. You must also purchase an acrylic repair kit meant specifically for hot tubs. Your local hot tub retailer will likely have these in stock; otherwise, you can grab them at a hardware store. Other items you will need include:
Hot tub cleaner
Sandpaper in various grains
Soft towel
A drill and rotary bit
Steps to Fix Cracks or Scratches
After gathering the necessary supplies, it is time to start the repair. Please note, if upon inspection you find that the crack goes beyond the shell and into the fiberglass or polymer ABS, it is best to hire a professional to repair the cracked hot tub, as it may be too extensive and even require hot tub replacement.
1. Drain the Hot Tub
First, drain the hot tub completely. The area must be completely dry, so doing this a day or two before you plan to fix the crack may help.
2. Clean and Dry the Area
Clean the hot tub, removing any bacteria or film left behind. You can use whatever standard hot tub cleaner you use on a regular basis. Be sure to dry the area thoroughly when finished.
3. Apply the Patch Kit
You can use the same patch kit for a scratch or crack, but the methods differ.
Repairing a Scratch
Apply some of the epoxy from the spa repair kit. You will typically need only a small amount, depending on the scratch size.
Repairing a Crack
Before filling a crack, use your drill and bit to create a “V” shape out of the crack. This creates more surface to fill. Focus on the edges nearest the surface when creating your “V”. Next, apply epoxy just as you would for a surface scratch.
4. Allow It to Dry
Read the package instructions for recommended drying time. Make sure to allow ample time so the epoxy settles and cures the scratch or crack.
5. Sand Rough Areas
Using standard sandpaper, sand the edges and bumps to create a smooth surface. You can experiment with different grains, depending on the amount of epoxy used and how it dried.
6. Clean the Hot Tub
After repairs, it is important to clean the area to remove any residue. This ensures that, when you refill the tub, you have clean water to enjoy.
7. Buff the Area
Using a soft towel, buff the area to regain the shine, as the epoxy can give it a dull appearance.
8. Refill the Hot Tub
If you are certain the crack or scratch is fully fixed, you can refill the tub. Watch carefully for any leaks or signs that the crack was not properly repaired. If water still leaks, make sure you know who to call to repair your hot tub.
Preventing Scratches or Cracks in a Hot Tub
Keep the hot tub covered when not in use.
Only use approved accessories or systems on or in the hot tub.
Clean and maintain the hot tub according to the manufacturer’s directions.
Do not allow accessories or anything except people in proper swimwear attire into the hot tub.
Ensure the hot tub is on a steady and stable surface.
Frequently Asked Questions
Most hot tub cracks can be repaired unless they have gone beneath the acrylic. If so, you may need a professional to determine if the crack is repairable or if you should consider hot tub replacement instead.
Yes, you can use silicone or epoxy hot tub repair kits to repair cracks in a hot tub. Always read the manual to see what the manufacturer recommends before attempting to repair a hot tub.